A practical worksheet for face outline observations

[Lucaspr]

Our drawing group is making outline studies, and I want to describe the head before adding eyes or shading. I keep noticing the jaw first, which makes it difficult to judge the overall outline without jumping to a label. I have been looking for a reference on square face shape to help frame the discussion. Rather than copy a category name into my notes, I would like to record which visible proportions support that description. Would comparing forehead width, cheekbone width and jaw width give the group a clearer starting point than guessing from memory? Some reference pictures hide the sides of the forehead under hair, which leaves gaps that I do not want to invent. My plan is to give everyone the same outline worksheet and compare observations before starting the more detailed sketches. It would help if the exercise allowed mixed features, because a tidy label can distract us from what is actually visible. Which observations would you put on the worksheet to keep the discussion practical and grounded in the actual reference picture?